/*
 * Copyright (c) 2009-2012 jMonkeyEngine
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * * Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * * Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * * Neither the name of 'jMonkeyEngine' nor the names of its contributors
 *   may be used to endorse or promote products derived from this software
 *   without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package com.multinodus.satteliteexplorer.ui.scene.models.planet;

import com.jme3.asset.AssetManager;
import com.jme3.export.InputCapsule;
import com.jme3.export.JmeExporter;
import com.jme3.export.JmeImporter;
import com.jme3.export.OutputCapsule;
import com.jme3.material.Material;
import com.jme3.math.ColorRGBA;
import com.jme3.post.Filter;
import com.jme3.renderer.RenderManager;
import com.jme3.renderer.ViewPort;

import java.io.IOException;

/**
 * A filter to render a fog effect.
 * Modified to be compatible with
 * jmeplanet logarithmic depth
 * buffer shaders.
 *
 * @author RÃ©my Bouquet aka Nehon
 */
public class PlanetFogFilter extends Filter {

  private ColorRGBA fogColor = ColorRGBA.White.clone();
  private float fogDensity = 10f;
  private float fogDistance = 0.5f;

  /**
   * Creates a FogFilter
   */
  public PlanetFogFilter() {
    super("FogFilter");
  }

  /**
   * Create a fog filter
   *
   * @param fogColor    the color of the fog (default is white)
   * @param fogDensity  the density of the fog (default is 0.7)
   * @param fogDistance the distance of the fog (default is 1000)
   */
  public PlanetFogFilter(ColorRGBA fogColor, float fogDensity, float fogDistance) {
    this();
    this.fogColor = fogColor;
    this.fogDensity = fogDensity;
    this.fogDistance = fogDistance;
  }

  @Override
  protected boolean isRequiresDepthTexture() {
    return true;
  }

  @Override
  protected void initFilter(AssetManager manager, RenderManager renderManager, ViewPort vp, int w, int h) {
    material = new Material(manager, "MatDefs/Planet/Fog.j3md");
    material.setColor("FogColor", fogColor);
    material.setFloat("FogDensity", fogDensity);
    material.setFloat("FogDistance", fogDistance);
  }

  @Override
  protected Material getMaterial() {

    return material;
  }


  /**
   * returns the fog color
   *
   * @return
   */
  public ColorRGBA getFogColor() {
    return fogColor;
  }

  /**
   * Sets the color of the fog
   *
   * @param fogColor
   */
  public void setFogColor(ColorRGBA fogColor) {
    if (material != null) {
      material.setColor("FogColor", fogColor);
    }
    this.fogColor = fogColor;
  }

  /**
   * returns the fog density
   *
   * @return
   */
  public float getFogDensity() {
    return fogDensity;
  }

  /**
   * Sets the density of the fog, a high value gives a thick fog
   *
   * @param fogDensity
   */
  public void setFogDensity(float fogDensity) {
    if (material != null) {
      material.setFloat("FogDensity", fogDensity);
    }
    this.fogDensity = fogDensity;
  }

  /**
   * returns the fog distance
   *
   * @return
   */
  public float getFogDistance() {
    return fogDistance;
  }

  /**
   * the distance of the fog. the higer the value the distant the fog looks
   *
   * @param fogDistance
   */
  public void setFogDistance(float fogDistance) {
    if (material != null) {
      material.setFloat("FogDistance", fogDistance);
    }
    this.fogDistance = fogDistance;
  }

  @Override
  public void write(JmeExporter ex) throws IOException {
    super.write(ex);
    OutputCapsule oc = ex.getCapsule(this);
    oc.write(fogColor, "fogColor", ColorRGBA.White.clone());
    oc.write(fogDensity, "fogDensity", 0.7f);
    oc.write(fogDistance, "fogDistance", 1000);
  }

  @Override
  public void read(JmeImporter im) throws IOException {
    super.read(im);
    InputCapsule ic = im.getCapsule(this);
    fogColor = (ColorRGBA) ic.readSavable("fogColor", ColorRGBA.White.clone());
    fogDensity = ic.readFloat("fogDensity", 0.7f);
    fogDistance = ic.readFloat("fogDistance", 1000);
  }


}
